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Firlakuza [10]
3 years ago
11

PLZ HELP I NEED THE RIGHT ANSWER ASAP!!!!!!!!

Mathematics
1 answer:
const2013 [10]3 years ago
3 0

Answer:

B. 66

Step-by-step explanation:

\frac{1}{x}(2x + 192)       Substitute x = 3

\frac{1}{3} (2 *3+192)    Multiply in the parentheses

\frac{1}{3}(6 + 192)          Add

\frac{1}{3}(198)                Multiply

66

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Find the angle which is equal to its supplement. ​
vesna_86 [32]

Answer:

the angle which is equal to its supplement is 90 degree

8 0
3 years ago
A certain disease has an incidence rate of 0.1%. If the false negative rate is 8%
defon

Answer: 0.31 or 31%

Let A be the event that the disease is present in a particular person

Let B be the event that a person tests positive for the disease

The problem asks to find P(A|B), where

P(A|B) = P(B|A)*P(A) / P(B) = (P(B|A)*P(A)) / (P(B|A)*P(A) + P(B|~A)*P(~A))

In other words, the problem asks for the probability that a positive test result will be a true positive.  

P(B|A) = 1-0.02 = 0.98 (person tests positive given that they have the disease)

P(A) = 0.009 (probability the disease is present in any particular person)

P(B|~A) = 0.02 (probability a person tests positive given they do not have the disease)

P(~A) = 1-0.009 = 0.991 (probability a particular person does not have the disease)

P(A|B) = (0.98*0.009) / (0.98*0.009 + 0.02*0.991)

= 0.00882 / 0.02864 = 0.30796

*round however you need to but i am leaving it at 0.31 or 31%*

If you found this helpful please mark brainliest

3 0
3 years ago
The price of a new car was $12 500 It is reduced to £11 625 Work out the percentage reduction
cricket20 [7]
Answer:

12,500-11,625=875

875/12,500=7/100

7/100*100=7

The percentage reduction is 7%

P.S * represents multiplication
4 0
3 years ago
What is the equation of the directrix of the parabola given by the equation (y − 3)2 = 8(x − 5)?
Licemer1 [7]
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Since it opens to the right, the directrix will be a vertical line 2 units to the left of the vertex, so its equation will be x=(5-2), or x=3
8 0
4 years ago
Keenan buys an embroidery machine for $1,400. He uses it to embroider T-shirts. His total profit in dollars from selling the T-s
Romashka [77]

Answer:

the graph shift down 135 units

Step-by-step explanation:

when there is no fixing cost:

f(x)=12x-1400

when there is fixing cost (0ne time): 12x-(1400+135)

the graph shift down 135 units

7 0
3 years ago
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